Which is the best predictor of the radioactive nature of an isotope?
The best predictor of the radioactive nature of an isotope is the neutron-to-proton ratio of the atom. Isotopes are atoms of elements having the same number of protons however they don’t have the same number of neutrons. Each isotope of an element will have different values of mass number.
Which characteristics of a radioisotope make it useful?
A radioisotope is most useful diagnostically when it has a short half life and is taken up by more specific tissues. An isotope with a short duration of activity is desired, because it is preferred not to have radioisotopes persist in the patient’s body any longer than necessary.
What kind of radioactive element is useful for dating an object?
Potassium-Argon (K-Ar) dating is the most widely applied technique of radiometric dating. Potassium is a component in many common minerals and can be used to determine the ages of igneous and metamorphic rocks. The Potassium-Argon dating method is the measurement of the accumulation of Argon in a mineral.
What is the half life of the radioactive isotope quizlet?
the time it takes for the number of nuclei of the isotope in a sample to halve. Different radioactive isotopes have different half-lives. For example, the half-life of carbon-14 is 5,715 years, but the half-life of francium-223 is just 20 minutes. The nuclei of radioactive atoms are unstable.
What is meant by the half-life of a radioactive isotope?
Half-life, in radioactivity, the interval of time required for one-half of the atomic nuclei of a radioactive sample to decay (change spontaneously into other nuclear species by emitting particles and energy), or, equivalently, the time interval required for the number of disintegrations per second of a radioactive …
What occurs during 1/2 life of a radioactive isotope?
The half-life of a radioactive isotope is the amount of time it takes for one-half of the radioactive isotope to decay. The half-life of a specific radioactive isotope is constant; it is unaffected by conditions and is independent of the initial amount of that isotope. Consider the following example.